Salsify
Tragopogon porrifolius
Also known asOyster plant · Vegetable oyster · Common salsify · Goatsbeard · Purple salsify
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 3–9 (winter low around -40°C)
- Frost
- very hardy (survives deep cold)
- Season
- cool (spring/fall)
Growing systems
Root mass: heavy. Thin-channel systems can't hold this crop.
Growing media
| Medium | pH effect | Retention | Bacterial surface |
|---|---|---|---|
| Soil-based mix (Potting soil) | varies | high | high |
Nutrient demand by stage
NPK ratios are relative weights. EC targets shift through the plant's life.
| Stage | N | P | K | EC (mS/cm) |
|---|---|---|---|---|
| seedling | 1 | 1 | 1 | 0.6 |
| vegetative | 1 | 1 | 2 | 1.3 |
Aquaponics suitability
Not recommended
Fish waste alone doesn't supply enough of what this crop demands. Grows in hybrid systems with supplemental dosing, but expect active management.
Care notes
A deep-rooted crop needing about 30 cm of loose, obstacle-free growing medium, similar to parsnip or long daikon. Use media beds or very tall containers with fine-grained, stone-free substrate. EC 1.0-1.6 mS/cm. pH 6.0-7.0. Temperature: 12–22°C (cool-season). Moderate light (DLI 14-20 mol/m2/day). Long season: 120-150 days from seed. Direct seed, since the taproot does not survive transplanting, and thin to 8–10 cm spacing. Seed viability declines quickly, so use fresh seed. Harvest by loosening the media deeply and pulling the fragile root carefully, as the roots snap easily. Process quickly after harvest: peel and drop the pieces straight into acidulated water (with lemon juice or vinegar) to prevent browning. For roasted salsify, toss peeled, cut pieces with olive oil, salt and thyme and roast at 200°C until golden and caramelized; the flavour is delicate and mildly sweet.